/**
  * Extend the product model with a packaging field
  * @return [type] [description]
  */
 public function boot()
 {
     Product::extend(function ($model) {
         $model->belongsTo['packaging'] = ['Bedard\\USPS\\Models\\Packaging'];
     });
     Event::listen('backend.form.extendFields', function ($widget) {
         if (!$widget->getController() instanceof Products) {
             return;
         }
         if (!$widget->model instanceof Product) {
             return;
         }
         $widget->addSecondaryTabFields(['packaging_id' => ['tab' => 'bedard.shop::lang.products.details_tab', 'label' => 'Packaging', 'comment' => 'Select the smallest packaging this product can be mailed in.', 'type' => 'dropdown', 'options' => Packaging::all()->lists('name', 'id'), 'span' => 'right']]);
     });
 }